The sermon continues a verse-by-verse series through Matthew, arriving at Matthew 18:15-20, read against the backdrop of the preceding parable of the lost sheep. The preacher recaps that parable first: a shepherd with a hundred sheep who loses one does not shrug off the loss because ninety-nine remain safe; he leaves the ninety-nine and searches for the one that strayed, and rejoices more over its recovery than over the sheep that never wandered. The sheep represent believers, and the shepherd represents the Father, whose care is not satisfied by keeping merely the majority safe. The point of the parable, the sermon stresses, is not that one sheep matters more than the ninety-nine but that every single sheep matters supremely to God, and he will lose none of them. The passage that follows shows how this parental care for the straying is meant to be lived out inside the Christian community itself — not just by God toward individuals, but by believers toward one another, since as both children and servants of God, Christians are called to love what the Father loves, including his flock in all its brokenness.

From there the sermon works through Jesus' four escalating steps for confronting a sinning brother, framing them with four pastoral principles. First, before any confrontation is attempted, the offended party should ask whether the wrong can simply be forgiven and released, since love keeps no record of wrongs and defaults toward forgiveness, entrusting the brother to God in prayer rather than always escalating to confrontation. Second, where confrontation is necessary, the rule is minimum exposure: approach privately, one to one, so that if the brother repents there is no need to add public shame to private repentance — the goal is to win the brother, not to humiliate him, though seeking counsel from mature believers to test one's own judgment of what counts as sin is commended. Third, confrontation must proceed from a humble heart rather than pride or hatred, remembering that the confronter is himself only acceptable to God by grace, and so must rebuke frankly but never contemptuously, echoing the Old Testament instruction not to hate one's brother in the heart but to reason plainly with him. Fourth, real confrontation requires courage, since the Greek verb behind "tell him his fault" carries the sense of making a person reckon with his guilt in both mind and heart; this is uncomfortable and risks the relationship, but withholding the confrontation out of fear of man is itself the unloving choice.

If private appeal fails, Jesus' second step is to bring one or two others along, both to make the appeal more persuasive and to supply a check against merely subjective disagreement between two individuals over what Scripture requires. If that too fails, the matter goes to the whole church, whose collective appeal represents the final attempt to reclaim the brother before any verdict is rendered. Only if the brother refuses even the church's appeal is he to be treated "as a Gentile and a tax collector" — not, the sermon insists, as someone newly deserving compassion (compassion has been present throughout), but as someone now formally reckoned outside the believing community: excluded from the Lord's Supper and from membership and ministry, though never excluded from the church's doors or ongoing evangelistic love. The sermon argues that many churches know the biblical teaching and even love the brother enough to confront him, yet still fail at this final, hardest step of actually pronouncing judgment when repentance is refused, and that failing to make this distinction clear harms both the unrepentant person, who is falsely reassured, and the church's unity in doctrine and practice.

The sermon then qualifies the pattern with three exceptions: it does not apply to sin that is already publicly known, since there is no exposure left to minimize; it does not straightforwardly apply to an elder or deacon in sin, since 1 Timothy 5 requires two or three witnesses before any charge is entertained and since Matthew 18 assumes peer relationships rather than power imbalance, so such cases should go to fellow elders or the wider church body; and not every sin warrants excommunication, since censures scale from admonition, to rebuke, to suspension from the Lord's Supper, reserving excommunication (illustrated by the man in Corinth handed over "for the destruction of the flesh") for serious, unrepentant sin. Finally, the sermon applies this directly to the congregation's Asian-majority culture, naming a Confucian-influenced instinct to prize public image and avoid confrontation as antithetical to the honest, sanctifying love Matthew 18 requires, while commending the church for holding together Western concern for truth-telling with Eastern concern for honor and community, for the sake of the flock's purity and the offender's ultimate restoration.

Bible Verses Used

• Matthew 18:10-14: The parable of the lost sheep, recapped as the theological foundation — God's relentless, individualized care for every straying believer.

• Matthew 18:15-20: The sermon's main text, unpacked step by step as the church's four-stage process for confronting and, if necessary, excommunicating an unrepentant brother.

• Leviticus 19:17: Cited to ground the principle that confrontation must be loving and frank rather than born of hidden hatred.

• 1 Timothy 5:19: Cited as the reason the ordinary Matthew 18 process does not apply unmodified to accusations against elders.

• Titus 3:10: Cited as an example of a lesser censure (admonition) short of excommunication.

• Titus 1:13: Cited as an example of a sharper rebuke administered in Christ's name.

• 2 Thessalonians 3:14: Cited as an example of temporary suspension from fellowship as a disciplinary measure.

• 1 Corinthians 5: Cited as the biblical precedent for excommunication, referencing the man "delivered to Satan" for unrepentant sin.